ON 20030730@9:21:12 AM at page:
http://massmind.org/techref/microchip/dsp/av-256w-aw.htm
DAV-MP-E62a David A Cary See also:
http://www.htsoft.com/cgi-bin/agnes?PicforumAgnes+PicforumAgnesHTMLArticle+2775.2
Frank Everest mentions very similar idea:
<pre>
  temp = (average - new) >> time_value
  average = average - t
</pre>
is a quick implementation of
<p>
average = ( (2^time_value - 1)*average + (1)*new ) / 2^time_value.